配置Apache+Tomcat集群

操作系统：Debian6.0 (192.168.225.129 虚拟机1台)

软件版本：Apache-2.2.16, Tomcat-6.0.35

1.安装软件

>apt-get install update

*安装Apache

>apt-get install apache2

*安装Tomcat

>wget http://apache.etoak.com/tomcat/tomcat-6/v6.0.35/bin/apache-tomcat-6.0.35.tar.gz

>tar zxvf apache-tomcat-6.0.35.tar.gz

>mv apache-tomcat-6.0.35 /user/local/tomcat

>cp /usr/local/tomcat /usr/local/tomcat2

*安装mod_jk

>apt-get install libapache2-mod-jk

2.配置2个Tomcat

现在/usr/local目录中已经有2个tomcat目录了，需要更改tomcat2的端口，防止端口冲突。

>nano /usr/local/tomcat/conf/server.xml

有3处的默认端口需要更改：

1.<Server port="8004" shutdown="SHUTDOWN"> 我更改为8003

2.<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />

更改为7080

3.<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

更改为7009，其中redirectPort 8443不需要更改

o.另外还需要在<Engine>配置中加入<Cluster>配置

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
	channelSendOptions="8">
<Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" 
		notifyListenersOnReplication="true"/>
<Channel className="org.apache.catalina.tribes.group.GroupChannel">
<Membership className="org.apache.catalina.tribes.membership.McastService" 
			address="228.0.0.4" 
			port="45564" 
			frequency="500" 
			dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" 
			address="auto" 
			port="4001" 
			selectorTimeout="5000" 
			maxThreads="6"/>
<!-- timeout="60000"-->
<Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
	<Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter=""/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" 
		tempDir="/tmp/war-temp/" 
		deployDir="/tmp/war-deploy/" 
		watchDir="/tmp/war-listen/" 
		watchEnabled="false"/>
    <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
    <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>   
</Cluster>

x.最后2个tomcat都需要改变<Engine的 jvmRoute属性分别为tomcat1和tomcat2，以对应之后worker.properties中的名字。

3.配置Apache以jk方式和tomcat集群

安装完成后apache的主目录为/etc/apache2,安装完mod-jk之后，mods-enabled里面会多一个jk.load

创建文件 /etc/apache2/mods-enabled/jk.conf

>nano /etc/apache2/mods-enabled/jk.conf

JkWorkersFile /etc/apache2/workers.properties
JkShmFile /var/log/apache2/mod_jk.shm
JkLogFile /var/log/apache2/mod_jk.log
JkLogLevel info

创建文件 /etc/apache2/workers.properties

>nano /etc/apache2/workers.properties

worker.list=controller1

worker.tomcat1.port=8009
worker.tomcat1.host=localhost
worker.tomcat1.type=ajp13
worker.tomcat1.lbfactor=1

worker.tomcat2.port=7009
worker.tomcat2.host=localhost
worker.tomcat2.type=ajp13
worker.tomcat2.lbfactor=1

worker.controller1.type=lb
worker.controller1.sticky_session=1 #可选项0,1
worker.controller1.balance_workers=tomcat1,tomcat2

更改/etc/apache2/sites-enabled/000-default文件

在</VirtualHost>之前添加

JkMount /* controller1

(controller1对应workers.properties中的名字)

配置完成之后先后启动tomcat和apache。

测试：

2个tomcat部署相同的应用：即首页index.jsp显示各自tomcat名称tomcat1和tomcat2

通过80端口访问应用，刷新几次，tomcat1和tomcat2轮流显示。